Spray dryer



FIG. 1 is a front elevation of a spray dryer showing my new design;

FIG. 2 is a right-side elevation thereof;

FIG. 3 is a left-side elevation thereof;

FIG. 4 is a rear elevation thereof;

FIG. 5 is a top plan thereof;

FIG. 6 is a bottom plan thereof; and,

FIG. 7 is a perspective view of the right side thereof, as seen from above. 

An ornamental design for a spray dryer, as shown and described. 